GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_watchdog
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*
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* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* The 'watchdog timer' unit test checks that the watchdog timer
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* will not cause a system restart during the timeout period after
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* a timer reset.
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*
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* The 'watchdog reboot' unit test checks that the watchdog timer
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* actually reboots the system after a timeout. The test is only
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* executed on explicit request. Use the following commands:
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*
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* setenv efi_selftest watchdog reboot
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* bootefi selftest
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*/
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#include <efi_selftest.h>
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/*
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* This is the communication structure for the notification function.
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*/
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struct notify_context {
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/* Status code returned when resetting watchdog */
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efi_status_t status;
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/* Number of invocations of the notification function */
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unsigned int timer_ticks;
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};
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static struct efi_event *event_notify;
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static struct efi_event *event_wait;
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static struct efi_boot_services *boottime;
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static struct notify_context notification_context;
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static bool watchdog_reset;
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/*
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* Notification function, increments the notification count if parameter
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* context is provided.
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*
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* @event notified event
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* @context pointer to the timeout
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*/
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static void EFIAPI notify(struct efi_event *event, void *context)
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{
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struct notify_context *notify_context = context;
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efi_status_t ret = EFI_SUCCESS;
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if (!notify_context)
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return;
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/* Reset watchdog timer to one second */
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ret = boottime->set_watchdog_timer(1, 0, 0, NULL);
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if (ret != EFI_SUCCESS)
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notify_context->status = ret;
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/* Count number of calls */
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notify_context->timer_ticks++;
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}
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/*
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* Setup unit test.
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*
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* Create two timer events.
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* One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT.
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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efi_status_t ret;
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boottime = systable->boottime;
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notification_context.status = EFI_SUCCESS;
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notification_context.timer_ticks = 0;
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ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL,
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TPL_CALLBACK, notify,
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(void *)¬ification_context,
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&event_notify);
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not create event\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
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TPL_CALLBACK, notify, NULL, &event_wait);
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if (ret != EFI_SUCCESS) {
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efi_st_error("could not create event\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Execute the test resetting the watchdog in a timely manner. No reboot occurs.
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup_timer(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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watchdog_reset = true;
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return setup(handle, systable);
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}
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/*
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* Execute the test without resetting the watchdog. A system reboot occurs.
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup_reboot(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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watchdog_reset = false;
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return setup(handle, systable);
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}
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/*
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* Tear down unit test.
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*
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* Close the events created in setup.
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int teardown(void)
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{
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efi_status_t ret;
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/* Set the watchdog timer to the five minute default value */
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ret = boottime->set_watchdog_timer(300, 0, 0, NULL);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Setting watchdog timer failed\n");
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return EFI_ST_FAILURE;
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}
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if (event_notify) {
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ret = boottime->close_event(event_notify);
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event_notify = NULL;
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not close event\n");
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return EFI_ST_FAILURE;
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}
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}
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if (event_wait) {
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ret = boottime->close_event(event_wait);
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event_wait = NULL;
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not close event\n");
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return EFI_ST_FAILURE;
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}
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Execute unit test.
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*
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* Run a 600 ms periodic timer that resets the watchdog to one second
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* on every timer tick.
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*
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* Run a 1350 ms single shot timer and check that the 600ms timer has
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* been called 2 times.
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int execute(void)
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{
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size_t index;
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efi_status_t ret;
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/* Set the watchdog timeout to one second */
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ret = boottime->set_watchdog_timer(1, 0, 0, NULL);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Setting watchdog timer failed\n");
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return EFI_ST_FAILURE;
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}
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if (watchdog_reset) {
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/* Set 600 ms timer */
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ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC,
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6000000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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}
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/* Set 1350 ms timer */
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ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 13500000);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not set timer\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->wait_for_event(1, &event_wait, &index);
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if (ret != EFI_SUCCESS) {
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efi_st_error("Could not wait for event\n");
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return EFI_ST_FAILURE;
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}
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if (notification_context.status != EFI_SUCCESS) {
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efi_st_error("Setting watchdog timer failed\n");
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return EFI_ST_FAILURE;
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}
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if (notification_context.timer_ticks != 2) {
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efi_st_error("The timer was called %u times, expected 2.\n",
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notification_context.timer_ticks);
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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EFI_UNIT_TEST(watchdog1) = {
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.name = "watchdog timer",
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.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
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.setup = setup_timer,
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.execute = execute,
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.teardown = teardown,
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};
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EFI_UNIT_TEST(watchdog2) = {
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.name = "watchdog reboot",
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.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
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.setup = setup_reboot,
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.execute = execute,
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.teardown = teardown,
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.on_request = true,
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};
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